Rack foot or support



Jun 16," 1925.

' 3 5. N. HURT RACK FOOT OR SUPPORT Filed Dec 10. 1919 Patented June 16,1925.

UNITED STATES PATENT OFFICE.

SAMUEL N. HURT, OF TOLEDO, OHIO, ASSIGNOR TO TOLEDO SCALE COMPANY, OFTOLEDO, OHIO, A CORPORATION OF NEW JERSEY.

RACK FOOT OR SUPPORT.

Application filed December 10, 1919. Serial No. 343,915.

T all whom it may concern Be it known that I, SAMUEL N. HURT, a citizenof the United States, residing at Toledo, in the county of Lucas andState of Ohio, have invented certain new and useful Improvements in RackFeet or Supports, of which the following is a specification.

This invention relates to weighing scales, and particularly scales ofthe type in which 1 an indicator is operated from the weighing mechanismby means of a rack meshing with a pinion connected to the indicator.

The object of the invention is to provide an improved mounting for therack bar whereby the rack and pinion may be readily brought intoalignment to secure substantially perfect mesh, and the object isaccomplished by making the connection between the'rack bar and theweighing mechanism adjustable angularly as well as perpendicularlyrelative to the plane of movement of the part to which it is connected.

Other objects and advantages will be apparent from the followingdescription, in

' which reference is had to the accompany ing drawings illustrating apreferred embodiment of my invention and in which similar referencenumerals designate similar parts throughout the several views.

In the drawings Figure 1 is a rear elevation of a scale with the housingbroken away to show the rack foot mounting embodying my invention, partof the weighing mechanism being shown in dotted lines;

Figure 2 is an enlarged perspective view ofthe rack foot mounting;

Figure 3 is a rear elevation of the rack foot shown in Figure 2; and

Figure 4 is an elevation of the rack foot, rack bar and pinion, part ofthe rack bar being broken out.

For exemplification, I have shown my invention as applied to a scalehaving a base 1 which supports a housing 2 containing theload-offsetting mechanism of the scale. The

indicator is of the type having a cylindrical chart, and is containedwithin a substantially cylindrical casing 3 mounted upon the housing 2.The load-offsetting mechanism shown in dotted lines in Figure 1 consistsessentially of a pendulum 4, suspended from knife edge pivots 5 rockablymounted in bearings 6, the bearings 6 being-rigidly secured upon abracket extending into the housing 2. The pendulum 4 has a power sector7 rigidly connected thereto, and a flexible steel band or ribbon 8 isfastened at its upper end to the power sector and passes downwardly overthe curved face thereof, being connected at its lower end to the nose ofthe main lever of the scale.

Extending laterally from the nose end of the main scale lever and rigidwith respect thereto is an arm 9 carrying a pair of rearwardlyprojecting perforated lugs 10, to which the rack foot embodying myinvention is pivoted, a rod 11 passing through the lugs and through apair of ears 12 depending from the ends of the plate 13. The plate 13has a second pair of ears 14 depending from its sides, (see Figure 2),through which passes a pintle 14 forming a fulcrum for the plate 16,ears 15 depending from this plate fitting over the pintle. The plate 16is secured by means of screws 17 to a horizontally-extending portion ofa comparatively heavy rack foot 18. As shown in dotted lines in Figure3, the openings in the member 18 through which the screws 17 pass areelongated, so that a lateral adjustment of the rack foot may be made byloosening the screws and moving the member 18 laterally. The rack barmay thus be brought into the plane of the pinion. A flat spring 19 isriveted upon the upper surface of the plate 13 and serves to yieldinglyhold the ends of the plates which are not pivoted together in spacedrelation (see Figure 3). A bolt 20 passes downwardly through alignedapertures in the rack foot and the plate 16 and engages a threadedopening in the plate 13, and a lock nut 21 is threaded upon the lowerend of the bolt 20. By turning the bolt so as to screw it into the plate13 the free ends of the plates 13 and 16 are drawn toward each otheragainst the tension of the spring 19 (which has an elongated openingsurrounding the bolt 20 to permit the spring to slide along thelowersurface of the plate 16), and the rack foot is thereby adjustedangularly with respect to the plane of movement of the main scale lever.turning the lock nut 21 the parts may be secured in adjusted position.

The rack foot 18 is herein shown as angusplit longitudinally andprovided with ertured lugs 26 being arranged to clai the rack bar firmlyto the pl: te 'lhe rael; bar may thus be threaded into the member andtion for its teeth with the teeth oi ing screw, as :3, r bar ag' Y t ingmovement. The center of gravi 13 ot the rack toot normally arranged in aplane but slightly out of aliannent with that of the rod 11,

turned t the proper posi- J' rrnei to clamp the rack and is adjustedangularly so that the weight oi the rael:

loot tends to .wing the rack to hold the rack in mesh with Lateraladjustment can be )3; turning the bolt 25, whe eby the spring 19 swingsthe rack bar laterally until it lies in the desired plane para le to theplane of movement of the main scz lever and perpendicular to the ion 28.

-ll hile it will be appa cut that the illustrated embodiment- 01 myinvention herein (lSUlOSQLl is well calculated to adequately fulfill theobjects primarily statec, it is to be understood that the invention issusceptible to variation, modification and change within the spirit andscope of the subjoined claims.

Ila-ring eescribed my invention, I claim:

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1 In a scale, in combination, a lever, a rack bar connected thereto,means 'lor adjusting saic rack bar augularly relative to the plane ofmovement of said lever, and means for aejusting said rack bar bodilylaterally.

2. In a sea e, in combination, a lever, a

rack bar eonucc'ed thereto, and means for adjusting said rack barangularly relative to the plin means c said of movement of said lever,said iorising a member connected to lever, a member con bar, a pivotalconnection between said members, and means providing tor limited relaivepivotal movement of said members.

8. In a scale, in and: bar connected thereto, means for ad justing saidraclc bar re ative to the plane oi. movement of said lever, comprising amember connected to said lever. a member connected to said rach bar, apivotal connec tion between said members, a s1 ring urging said membersto pivota. movement in one direction, and screw for causing relativepivotal movement of said members in the opposite direction.

'-l. In a rack adjusting device, in combination, a racl: foot, a membersecured thereto axis oi the Pill".

iIGCiLCd to said r; c:

combination, a lever, av

having an ear thereon, a second member having an ear overlapping andpivoted to the first said car, and a screw connecting said memberswhereby they may be relatively moved about the pivotal axis.

5. I1. a rack adjusting device, in combination, a rack feet, a membersecured thereto having a pair oi ears thereon, a second member having apair of ears overlapping and pivoted o the first said ears, a screwconnceti g said members, whereby they may be rclativ moved about thepivotal axis, and a liat spring seured to one of said irenibers andbearing against the other of i: members.

(3. In a scale, in combination, a lever, a raelr, means connecting saidall: to said lever comprising a member pivoted to said lever,'an'd arack foot connected to said member and adjustable relative thereto aboutan axis parallel to the plane of movement of said lever, said rack beingmounted on said footand adjustable relative thereto about an axisperpendicnlar to the axis of Eli, justnient between said member and sadfoot.

7. In a scale, in combination a lever, a tin: aided rack iar, and meansfor connecting said rack bar to said lever, comp 'ising aninternally-thr:aded member receiving the threaded end of said rack bar,means for locking said rack bar and said internallythreaded memberagainst relative movement, a rack toot connected to saidinternally-threaded member, a plate pivotally connected to said lever,and an angular-lyadjustable connection between said rack toot and saidplate.

8. The combination in a scale, 01 a lever, a rack bar, and a mountingfor said rack bar upon said lever, said mounting including means wherebysaid rack bar may be adjusted angularly, and means whereby said ael; barmay be adjusted bodily laterally.

S. The eon'ibination in a scale, of a lever, a racl: bar, a pinion, anda connection between the rael; bar and lover, including means wherebythe rack bar may be swung toward or away from the pinion, and meanswhere by the rack bar may be moved in a lateral direction parallel withthe axis oi the pinioin 10. The combination in a scale, of a lever, atick bar, a pinion, and a connection between the rack bar and leverwhereby the rack may be swung toward and away from the pinion and anintermediate COIIDPIJtlOIl.

G. O. MARSHALL, C. E. lVrLcox.

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